The Messenger of Allah ﷺ stood among us delivering a sermon of admonition and said, "People, you will be gathered before Allah barefoot, naked, and uncircumcised. 'As We began the first creation, We will repeat it. That is a promise binding upon Us. Indeed, We will do it.' [Anbiya 21:104]."
قام فينا رسول الله ﷺ خطيبا بموعظة، فقال: يا أيها الناس! إنكم تحشرون إلى الله حفاة عراة غرلا. {كما بدأنا أول خلق نعيده وعدا علينا إنا كنا فعلين} [الأنبياء: ١٠٤].
Bukhari narrated it in the Book of Heart-Softeners (6526), and Muslim in the Book of Paradise and the Description of Its Bliss (2860:58), both through Muhammad bin Jafar, who said, Shubah narrated to us, from Mughira bin Numan, from Saeed bin Jubayr, from Ibn Abbas, who said... and he mentioned it in a long hadith.